Slope of the line $$$y - 3 = 20 - 4 x$$$

The slope of the line $$$y = m x + b$$$ equals $$$m$$$.

Write the line in the form $$$y = m x + b$$$: $$$y = - 4 x + 23$$$.

So, the slope is $$$m = -4$$$.

The slope of the line is $$$m = -4$$$A.